Sms Elotherm Gmbh

Stefan Dappen

Peter Schulte

Matthias Blum

Martin Bröcking

A device for hardening the surface of a workpiece, wherein an energy supply part and a working part each include a magnetic core, wherein the magnetic cores are at a small distance from each other such that electrical energy is transmitted contactlessly from the energy supply part of the inductor to the working part of the inductor, and wherein the working part includes a heating conductor branch for inductive heating of a section of the surface of the workpiece; a control instrument coupled to the inductor, wherein the control instrument displaces the working part relative to the surface to be hardened and relative to the energy supply part, and wherein the magnetic core of the working part is displaced relative to the magnetic core of the energy supply part; and an electrical energy supply connected to the energy supply part of the inductor.

Device for hardening a cylindrical section of a workpiece and use of such a device

An inductor is provided for the simultaneous inductive heating of two tracks or ways which are formed next to one another on a metallic workpiece, having a first segment which is associated with the first track or way and a second segment which is associated with the second track or way, and having two supply arms via which the segments can be connected to a power supply. To enable two tracks or ways to be heated simultaneously to the hardening temperature without heating the material portion situated between the tracks or ways the segments of the inductor and the supply arms are connected together in an inductor in such a way that the fields travelling at right angles to the longitudinal extent of the tracks or ways neutralize each other in the region of the material portion which separates the tracks or ways from one another.

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Aachen, Germany

Stefan Dappen